Ingot-mold and sink-head lining-brick therefor.



Patented Mar. 6, I900.

J. 7K. GRIFFITH.

INGRT MOLD AND SINK HEAD LINING BRICK THEREFOR.

(Application filed Feb. 23, 1898.)

(No Model.) 6 1 6 I l a a WITNESSES INVENTOR m: Ncmms PEYERS co.PHDTO-L|THG.. wAsMmcTrm, n cy UNITED STATES PATENT OFFICE.

J AOOB Kl GRIFFITH, OF LATROBE, PENNSYLVANIA, ASSIGNOR TO THE LATROBESTEEL COMPANY, OF SAME PLACE.

lNGOT-MOLD AND SINK-HEAD LlNlNG-BRICK THEREFOR.

SPECIFICATION forming part of Letters Patent No. 64.4 740, dated March6, 1900. Application filed February 23, 1898. Serla1No.671,242. (Nomodel.)

To aZZ whom it may concern:

Be it known that I, J AOOB K. GRIFFITH, of Latrobe, in the county ofWestmoreland and State of Pennsylvania, have invented a new and usefulImprovement in Ingot-Molds and Sink-Head Lining-Bricks Therefor, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying drawing, forming part of thisspecification, in which the figure represents, in vertical section, aningot-mold provided with my improved lining-brick.

Myinvention relates to improved means for casting steel ingots; and itconsists in a mold having an opening at its lower end for the admissionof molten steel to be cast therein and having at its upper end arefractory hollow lining-brick, which is held or locked in the mold andis thus prevented from rising.

It also consists in a steel-ingot mold having at its upper end atapering hollow refractory brick; and it consists also in a sink-headlining-brick constituted as herein described.

In the drawing, 2 represents a mold, the form which I show being thatwhich is adapted for the manufacture of ingots for tires. This mold isopen at the bottom for the introduction of the steel thereinto frombelow through a suitable runner.

At the top of the mold is an upward sinkhead extension 3, open at thetop in order to constitute a space for the metal, which acts as a feederfor the metal in the mold, and this space I line with a refractoryhollow brick at. The chamber and the brick are made of upwardly-taperingform. The lower end of the hollow brick 4 is formed of aninternally-projecting ridge 5. In practice, in preparing the mold forcasting, the brick 4 is inserted thereinto from the lower end and isheld temporarily in place by means of a pin 6, which passes through ahole formed in the brick for that purpose. Then when the steel isintroduced in the mold through the bottom runner it will fill the moldand will then rise within the hollow brick 4. The metal in this hollowbrick constitutes a feeder or sink-head,which is kept fluid by thenon-conducting brick lining until after the metal in the body of theingot-mold has solidified. The metal in the sink-head therefore servesto receive the pipe which is formed when the ingot sets and also byremaining fluid after the metal in the mold proper has set makes thebody of the ingot solid. The

groove formed in the ingot by the ridge 5,55

marks a place where the sink-head can readily be fractured from theingot.

The tapering form of the hollow brick 3 holds it in place in the top ofthe mold and prevents it from being floated out by the metal.

It also enables it to accommodate itself to the rigid sides of the ironmold and to come to a proper fit notwithstanding any ordinary irregularities in the mold or brick. This is an important consideration,because, especially with large bricks, it would be difficult otherwiseto secure a proper fit of the brick in the mold, owing to the fact thatsuch bricks are liable to be more or less distorted in burning.

Furthermore, the tapering form facilitates the stripping of the ingotfrom the mold, which otherwise would be a laborious and often difficultoperation.

The bricks are easy to make and can be made and sold in quantities as acommercial article.

I claim- 1. A bottom-pour steel-casting mold, having an upper metalextension provided with a sink-head cavity, having a smooth inner 8oface which tapers upwardly and inwardly, the lower part of the cavitybeing at least as small as the mold-cavity, and a separately-moldedhollow burnt lining-brick fitting in the sinkhead cavity, and having atapered outer face;

substantially as described.

2. A bottom-pour mold, having an upwardly and inwardly taperingsink-head cavity, a correspondingly-tapered lining-brick fittingtherein, and a pin arranged to engage the up- J. K. GRIFFITH.

Witnesses:

THOMAS W. BAKEWELL, G. I. I'IOLDSHIP.

